Render asset credit inside the gallery lightbox correctly

GLightbox's own selector-based description feature never actually
resolved a selector in three different attempts -- literal text,
then a resolved-but-empty div, then apparently not firing at all
against the installed (unversioned) build. Replaced with a small
afterSlideLoad handler that reads a plain data-credit-selector
attribute and copies the real element's HTML into the slide's
description area directly, depending only on GLightbox handing back
a real DOM node per slide -- a much smaller contract than trusting
its own caption-resolution feature.

Renamed the credit div's class from glightbox-desc, since that name
is reserved by the library's own bundled CSS (display: none
!important) and can't be reliably overridden from here.

Also: distinguishes the credit line and the "N Bilder" caption from
ordinary body text (italic, muted, matching .author_and_date's
existing convention), and makes the lightbox's caption card follow
the site's light/dark toggle via Canvas/CanvasText, since the
library's bundled theme never adapts to it on its own.

1 files changed, 23 insertions, 3 deletions

diff --git a/public/stylesheets/ccc.css b/public/stylesheets/ccc.css
index 8358d06..9654594 100644
--- a/public/stylesheets/ccc.css
+++ b/public/stylesheets/ccc.css
@@ -727,7 +727,6 @@ div.teaser_ruler {
   min-width: 0;
 }
 
-
 .inline-image--full {
   width: 100%;
   margin: 1rem 0;
@@ -748,10 +747,31 @@ div.teaser_ruler {
   margin-left: 1rem;
 }
 
-#asset_credits .glightbox-desc {
+#asset_credits .asset_credit_block {
   display: none;
 }
 
-#asset_credits .headline_credit {
+#asset_credits .asset_credit_block.headline_credit {
   display: block;
 }
+
+#asset_credits {
+  border-top: dotted 1px silver;
+}
+
+#asset_credits,
+.right {
+  font-style: italic;
+  font-family: Georgia;
+  font-size: 0.9rem;
+  color: color-mix(in srgb, CanvasText, #808080);
+}
+
+.glightbox-clean .gslide-description {
+  background: Canvas !important;
+}
+
+.glightbox-clean .gslide-title,
+.glightbox-clean .gslide-desc {
+  color: CanvasText !important;
+}